Schmersal AZM 161SK-12 12RKA-110 Safety Interlock Switch

Schmersal AZM 161SK-12/12RKA-110/230 is a solenoid interlock safety switch (Power to Lock) in the AZM 161 family, designed to secure access doors on industrial machinery. In the Power-to-Lock variant (RKA), energising the coil locks the door, providing tamper-resistant guarding when the machine is in operation. The unit integrates a 2 NO and 4 NC contact block in a bolting-style interlock, enabling monitoring of door position and interlock status within a single device. Housed in a rugged IP67 plastic enclosure, it is built to withstand harsh factory environments. The coil voltage supports 110 VAC or 230 VAC operation, offering compatibility with common control voltages across European and other markets. Typical applications include safeguarding hinged safety guards on presses, conveyors, and packaging lines, where a secure interlock and reliable door monitoring are required. As part of Schmersal’s safety ecosystem, the AZM 161SK-12/12RKA-110/230 supports integration into standard safety circuits and enables dependable door-lock action essential for protecting personnel during machine operation.